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A235414 Number of (n+1)X(2+1) 0..3 arrays with 2X2 subblock sums lexicographically nondecreasing rowwise and nonincreasing columnwise 1
2400, 64848, 1826923, 37684700, 782294899, 12863400296, 211918008383, 2916338598826, 40162081074843, 478836923802673, 5712559047430864, 60505768056073434, 641415858012884696, 6149515043055326889 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 2 of A235416

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..210

EXAMPLE

Some solutions for n=2

..0..2..0....2..1..1....1..0..2....3..1..1....2..2..2....1..1..2....3..0..0

..2..2..0....2..0..0....3..3..2....3..1..1....2..0..0....3..3..1....2..3..0

..3..2..2....0..3..1....2..2..2....3..3..1....1..3..1....0..3..1....3..1..1

CROSSREFS

Sequence in context: A234453 A236084 A204304 * A235259 A321638 A005073

Adjacent sequences:  A235411 A235412 A235413 * A235415 A235416 A235417

KEYWORD

nonn

AUTHOR

R. H. Hardin, Jan 10 2014

STATUS

approved

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Last modified December 6 18:16 EST 2021. Contains 349567 sequences. (Running on oeis4.)